Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4881fd6236123af7f338f82ae0c16c52222857fdca2c4d410ea23ef237387cc7' 
  AND token = 'b3sw88YyyZI+2VnsglVjASDCZNJPg8MaGxL193q1DQ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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