Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3ae195ebf9dbfb563ff2f156415f5c8e60c3b5044799fd547a7a870fb39f224' 
  AND token = 'b277LAjtFT7ipp1OrJ2QjmvBhB171dz3GdsAmWU1rl0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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