Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33af561dc477b2fccc6fbb2d634ee6f65c7db4722945f12809669e56cd9617f4' 
  AND token = '7euUg8prprJmsWmtUVmFmcZkIsSGGm5bCKmeDC0VJlM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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