Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c5fac4c9c31595f29f7cfb06f89d19c97254ce39cd9e3064845a85793d0878a' 
  AND token = '6w3cpqMWlOc43B9GfMkBE06hJkkuRL3y+geaV/fsxho=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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