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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '22e1ae32832d6a234a64295200d82944e2940746b130f55e57f87c6efaa46763' 
  AND token = 'Ff/7I4DIHH3XcgbcNEDOhcKwIUY0J7rJVbKYiXv6gl0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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