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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07efae25638f8d96235d53408f74ca80db950f23e42fceb2fc114d8a85b2e680' 
  AND token = '9vP7Jmk4HAHObUG/G1FrHbdsZEcTyT77RKGZH2vLwIs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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