Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '410170d9ffd01a27bfc53ee4357c6b22b68a0d4bde14af6c5074d8bf718bf131' 
  AND token = '6frUz/KHD7+KPtNU1iNKVkcyA2Qq1gDhk6BrDgl9E18=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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