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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60990b1be7b2d62a7a28c9b944f12465f4834a12b0d05e75b9a9e5b65974db95' 
  AND token = 'Gi1QkCkU1/94GGBp/ewzHpwrYzlaHy1wCYqzdg7rXkE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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