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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '679aaf57acf26eac3ed3073287e9c1c67c86348a7b30caf632dc784571848685' 
  AND token = 'tNJ2z2xKIoz0wCC8tTXLUk9m6eMbbzxeQuJCz74mh40=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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