Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53d66721ac64632ae3d08f7f2e71cb4ceab23c8a0ca24fb1c2cd63b178a84cba' 
  AND token = 'LsiOMeHETvtuZiwrQzZO+/r52wh0th6v84q+WTUJB4I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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