SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f3fa5b51b50c448424dac8cf3679697d207448848b837fb8061d469cf68044a' 
  AND token = 'GRm8PfglHdDmeqm8PYzxY4pRgCGUhT2soFkvzjWhAZg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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