Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19541f3a0d7a5d046c0af9e954e4cf2a9eb1464d93f0850a735cc78205e1c156' 
  AND token = 'd2892D54ehHRSLAakwK4ZTVqgOhZ2gRuy3x4WkeEFO4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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