Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8904c2ebc8ac2aa14d02fdfbe3e6f16b92cd1f74f59d3da30afa022d69c40ed2' 
  AND token = 'hdF5MpK+WutwOh0Zp71oI+ddWUAuELloWwBO1wbsSH4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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