Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a7f84554c5f132deb316661da30304e0c294f0c2c0b4e7e99a0fa197b3868d8' 
  AND token = 'FoH/wxfYR8OmSaaGMW3EKLkOoweNrYaKO7oNDMvDHMY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}