Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '15e6600ce634f30342a7771b2837b48b54df2e79c4485386f72c5a5aeaf2c6f3' 
  AND token = 'pxWkitdo/f2Bu2kgTyJG7Mu18z51wJ0977Gl3ZWM/gc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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