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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3940e4a1217ddedbc63c5fa6c16de0125869d8fb175a53680db53bdf6be6fd2d' 
  AND token = 'PG+2D1Faw82wPdFqZLyCyGJPFs+CRnh5padmBZDfkt4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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