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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b4836d719e822f28d80efe9938f3856ca5eb5488d0557c2ff6cb82ca30c15e5e' 
  AND token = 'TxicE9uuQz/Ep/OHJFKYPwJNhH2mCNGheGmwm0mQb0A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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