Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e79c4c4e5cbef42d530979274bc14890ca70c4a952bbc49b3c7566f1e1ef807a' 
  AND token = '/Y47xp6WYZojA+Tt2LWgAwelhdhnuTT5szUt7cjzla0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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