Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ceea40edddb72d39e02f7b99b96494853708a840098feb30f5c81792a308686' 
  AND token = 'WO8D8l7iAWZCoEbw53U2sNo1YJXnavtyVAcMx1Qws3A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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