SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06d2980b929cb1758585fabb694b2841d17b53a0605969269cb137f9c9573407' 
  AND token = 'pYATo+QD/vbw+JpKj82656gvB/5g7tGrH0iTxsqo0Y4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}