Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '96f96eede5599df386cb0c6f1fb9701d3d25585399b64512c703eccee0501c40' 
  AND token = 'CuIdKVWo+9H7/8uTHVSZRbHqmY4LprejAi9tbd8C/UM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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