Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c08ecf74e8cd5042407ab2cd8a2fb3271528dce90c442f5ddb9d67a082576c6' 
  AND token = 'tKAE212hSnl6NK6ZmdsPte6rhvu5Vcm1A0JLes9b88w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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