Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32a40ae7ec97f5b477436772e9afa1621ccd2c5ccbcf5d3ab4fb319fc277f81b' 
  AND token = '5loKGkLpJMwYkYx0j8tM6PacFhG1XJFuSPxDWEWh6ac=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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