Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc6a0461acde4fdff3a74bcdf1a0def4e6b0b962b16ac3e6025e8c1bf307eb84' 
  AND token = 'wvhCRA8H7aSy515j099phy6A0014LVVNASDwRKZnRFs=' 
  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"
    }
  }
}