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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '9d3d7d8826ea87c69c394d5781fbfedfbda485b9072600dc7708b4b6dcc55ee1' 
  AND token = '6Vu30eaprZfh2EnjokHZ4xsLdti2nysTjgtcxE8y/Xk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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