Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '801fe7ff0ec65e80e2057357c3430ee47abf05bc186278c5a30fe1afea9b11bc' 
  AND token = 'HRt2HmAJOLZQenRTjfoQjeu+HASZjyrj6smHgGJb7wQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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