SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2060c6bc97c9531831ac28bb5dc530a202ebe900defe6225f806e9934ade7507' 
  AND token = 'M+UqcBU4v+XVpZIZj/wOmN5plfGgfdTG756oUxpziTc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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