SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f82ba82b4690a47de3a545fccd612c3e846da569cb45ff67272097212d954ef' 
  AND token = 'oWhC9jNmVftkpo6H5aY/RKsAVFiUAPFmLUrG9AThtvs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00076

JSON explain

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