Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30dfe4fae421121337078d093adab44858512dd07b832ef66d7011b2d0273e29' 
  AND token = 'OsisgXQsEsMfKfzz0iS5ccW950nUuBWXUhV518ZHaqo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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