Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a62ae7eabf1b40196e5ab20a6c725fc29e9cb9315041bfd5ed3622ebd5c8b4a6' 
  AND token = '272CIwXFxR1992fUkhaBAbr4Mix2mrp7Biv9ed8IJQU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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