Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e23e961cfcd705dbd93f990a17d106cb6bba4d554ec6034d03ff4a323f5e350b' 
  AND token = '45V15x1a9EPeBpfkYWDUTq1u+ageDuDXC4e9ub6Jxgs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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