Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e84ce7074452ef579be2b39f4ee8c72e0c586d70a447d281737ab93e4e439b08' 
  AND token = 'fuR4HR0R2PzuQyvb50uNvSov/UgMSACsG5emFY6/tTU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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