Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '17bdcb7b1c9f3fca4e7d7a3abc4970bf7c8ef809a3abb57db5edc20bca76c345' 
  AND token = 'ic/yLE73FFBvoYhe+CaMmtFZvaR0URzWhJHRyiCqu+4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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