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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd25d40a325ff7eca2d47bfb70e2f718f697fd5c77495bfc1ae511b946c5cd718' 
  AND token = 'APndsy47s9GJTv7Hn51xys7A2BDYGbC/jZ2V/ftOPhI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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