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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '884d084603b3ee229af7839efa1eb4f364251ee3cb8005f766171d8fb5e06dfc' 
  AND token = 'QXsbEW0bc0ER1nWS0gPu2WEKfZKub2r5EpDJV48c2s0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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