Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '414a3ee97c94328a2bd731aba14de57e921e7ac947b937bc6b2f7e39f03a6ba0' 
  AND token = '1vZS8Fygpc+E6mWHmTOfnQ25zBGLlNOeF5GVOiebOTc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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