Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '042d9b9434c120a671111148f926af39408dcf299d4fad830c0a148559006523' 
  AND token = 'cJiR2hfhyKk7NVY5rnnMBKEYZvXeMkVVud/4TssG68g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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