Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dcfb847aee5f515a9977d3de32e2d0b736fe06cb57795a623a6e5051c904046e' 
  AND token = 'ek7Jyj5b2XfedHew47U1NFEg0J+/2aPUcKYVA4m7iRQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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