Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '216be303c9077fb2622c0583e223e08ced969994adc8fc515e9b023e8e94380b' 
  AND token = '8/tMwhWVxB5Q6vX32R3egioAtLjCEDSTs4NE+KQoa5o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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