SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '63a3098263facd5fe068dd3e372726c156e876a6c9b3f825b863b380a0426908' 
  AND token = 'JWnrLDXbd1vqYN8a+hU3VO9yCYXGWNECjWJCn/bQ+TE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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