Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e716e35fa16c0cc8a9916c726509aa223a1fe96ceec8320ecec2424fcb08ec6' 
  AND token = '4q0nK6DmwZYmNrhfqQxQuZZLhuRm6ORF3cbqz9gQgDw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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