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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '405f1a5d9fc7f15a552b0a62c7fb42dae2d37804f7c02a5f39b20da7f3fd3717' 
  AND token = 's/AzDAqfqD1GPIrV9OCcD49WGlJbsTcUi5JwWSt3+8g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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