Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60c60755cd67721d6e7d031d15457850e5d3e28fa02f7c6e4b718c764a8f7ff9' 
  AND token = 'LriNiRlnat39git3xA/e2slroWImjJK2oMk5uuoHO2Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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