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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4059c004d8ace580f9a612302ec67eec31a569179326276a1b554670a39df2c1' 
  AND token = 'lA3psZM8ydH+z8TcI4hhykl7OVhmXCf2Ya21M+tO3GY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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