Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f67825aa92addd5bd5e854c80e6717a8066faaf11e4af6005bf17582187bf978' 
  AND token = 'W8WQWCuAqEl4L8C9fdaUfZdyhvZqEROlP/iX/xzmtjs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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