Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '728a68294ce0e2f8b5a7c4441cee1dc83b0c73aaaf151bdd9032585e71bf55fa' 
  AND token = 'pWMGZ4NeDqJQq03HqbPruxfpS4f1fKsvp6A5/aQKnxM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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