Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e7c10bde502a72fd84061bdebc2d635efc3aa9e694dc27c18e995f164411bb9' 
  AND token = '3RRnFHO+H3xtVimtLe2S+yrccIKSYM9SwskJTQ3INWA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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