Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '218109c3858d545e311daac6d5ea0a950160a93989aac47cb2c2a74c26cbba75' 
  AND token = 'i4d22ltxFQ+Mbxu0rKOv/s+T91vAtEy3bc6aoAxPj10=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}