Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '443eddd6a8e60394e2e1574bf14aae2edf95ce62594784c6329c9855caad75e3' 
  AND token = 'W5zVsCzJcZHb7Itw4raAmu8aGempgmklma3Qi1tRDfI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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