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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '007583efdc23b8607e27103245c073eb8e4091d8e1e2f5aa2a0b470de6fe9815' 
  AND token = 'iELib7p2q4O6OuUSbO/ZxN8fz4RP2yVEZWR33/pIjrI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}