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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0683a9f3c5387fea56c2c7706fc65f0de0bae7f5d145ff5e63a4ebebebe8c785' 
  AND token = 'TAcpOwn3XXdw88Ucs03JwBYGOdaUbtiszPb+V4joCfA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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