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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e024f4bc78ef9f5baf1b42aa7f9ec011b3ec5ecfa43d162127e7a5e919fb497' 
  AND token = 'p/R5Ex2UwHtjGQoO2z/81k2rKZ9Otcx+pqrxU+a1ccA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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