Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd6cde799feb39efc974774ff07e4e7a0c16af0cf5077954141e74f92284676ff' 
  AND token = 'ijM2hQnI12VqalJDqDH2/oeFxsuMv9AJyGtQyo/5Tvg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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