Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd49bdeae4fffd9acafe05c706c9b89ba6c867b3667f2d03ef81ee180099f0d33' 
  AND token = '3ye9/TQAx1Q1noSwDZXV/kQ9o6K8pRZnnWWr5YXc4sM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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