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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cbaa7220f8383803bd3457a1d938c6292debc5b3530077e05d8bff2acebab18b' 
  AND token = 'aKZyOb58tLYE9kXu6/roFt7u6QMsc3HOZYfpXvwO2zk=' 
  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"
    }
  }
}