Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af70921bacf5b32b08562a6be2bd2c4edd72d608431a0e99d077bab8ece489b6' 
  AND token = 'JWTklbrUbd+tt8gKOowryWSkkr1z9/arxaLrhgDuGI8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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